powerpc: remove unused zInstall target from arch/powerpc/boot/Makefile

Commit c913e5f9 ("powerpc/boot: Don't install zImage.* from make
install") added the zInstall target to arch/powerpc/boot/Makefile,
but you cannot use it since the corresponding hook is missing in
arch/powerpc/Makefile.

It has never worked since its addition. Nobody has complained about
it for 7 years, which means this code was unneeded.

With this removal, the install.sh will be passed in with 4 parameters.
Simplify the shell script.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210729141937.445051-1-masahiroy@kernel.org

arch/powerpc/boot/Makefile

@@ -448,11 +448,7 @@ $(obj)/zImage.initrd:	$(addprefix $(obj)/, $(initrd-y))
 install: $(CONFIGURE) $(addprefix $(obj)/, $(image-y))
 	sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)"
 
-# Install the vmlinux and other built boot targets.
-zInstall: $(CONFIGURE) $(addprefix $(obj)/, $(image-y))
-	sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $^
-
-PHONY += install zInstall
+PHONY += install
 
 # anything not in $(targets)
 clean-files += $(image-) $(initrd-) cuImage.* dtbImage.* treeImage.* \

arch/powerpc/boot/install.sh

@@ -15,7 +15,6 @@
 #   $2 - kernel image file
 #   $3 - kernel map file
 #   $4 - default install path (blank if root directory)
-#   $5 and more - kernel boot files; zImage*, uImage, cuImage.*, etc.
 #
 
 # Bail with error code if anything goes wrong
@@ -41,15 +40,3 @@ fi
 
 cat $2 > $4/$image_name
 cp $3 $4/System.map
-
-# Copy all the bootable image files
-path=$4
-shift 4
-while [ $# -ne 0 ]; do
-	image_name=`basename $1`
-	if [ -f $path/$image_name ]; then
-		mv $path/$image_name $path/$image_name.old
-	fi
-	cat $1 > $path/$image_name
-	shift
-done;